From cce3e0eb2d88e467da1530e180593d27a1cdee73 Mon Sep 17 00:00:00 2001
From: Philip Trettner <Philip.Trettner@rwth-aachen.de>
Date: Sun, 10 May 2020 20:21:40 +0200
Subject: [PATCH] added conversion-based uniform API
---
.../functions/random/uniform.hh | 25 ++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/src/typed-geometry/functions/random/uniform.hh b/src/typed-geometry/functions/random/uniform.hh
index 2c655e83..7c79de88 100644
--- a/src/typed-geometry/functions/random/uniform.hh
+++ b/src/typed-geometry/functions/random/uniform.hh
@@ -25,7 +25,8 @@
#include "random.hh"
/*
- * uniform(rng) - fair coin flip
+ * uniform<T>(rng) - uniform sample for T's where no parameter is needed
+ * uniform(rng) - returns an object that implicitly converts to T (and calls uniform<T>(rng))
* uniform(rng, a, b) - uniform between a..b (inclusive!)
* uniform(rng, obj) - uniform sample from obj
*
@@ -47,6 +48,22 @@ struct sampler
{
static_assert(sizeof(T) >= 0, "sampling of this type not supported without parameters");
};
+
+// NOTE: this class should not be saved
+template <class Rng>
+struct uniform_sampler
+{
+ explicit uniform_sampler(Rng& rng) : rng(rng) {}
+
+ template <class T>
+ operator T() &&
+ {
+ return sampler<T>::uniform(rng);
+ }
+
+private:
+ Rng& rng;
+};
}
template <class T, class Rng>
@@ -55,6 +72,12 @@ template <class T, class Rng>
return detail::sampler<T>::uniform(rng);
}
+template <class Rng>
+[[nodiscard]] constexpr detail::uniform_sampler<Rng> uniform(Rng& rng)
+{
+ return detail::uniform_sampler<Rng>{rng};
+}
+
template <class Rng>
[[nodiscard]] constexpr f32 uniform(Rng& rng, f32 a, f32 b)
{
--
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